Fig. 1From: Quantitative methylation analysis reveals distinct association between PAX6 methylation and clinical characteristics with different viral infections in hepatocellular carcinomaGenes and the association of genes with diseases in HCC with different etiologic factors. The Venn diagram drawing the unique and overlapping genes in HBV-positive (HBV), HCV-positive (HCV), and double-negative (NBC) HCC (a). DAVID ontology (disease) for genes abnormally methylated in HBV, HCV, and NBC-HCC (b)Back to article page